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' y JY.- A. AYRES.

BOILER'PBBD 'WATER APPARATUS'. No. 27-4,103. "Patented Mar. ZO, 18813.V

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f UNITED 4STATES PATENT trice.

JARED A. AYRES, OF MYSTIC RIVER, CONNECTICUT, ASSIGNOE TO THE PNEUMATIC ENGINE COMPANY, OF SAME PLACE.

BOILER FEED-WATER APPARATUS.

SPECIFICATION forming' patri'. 0f Letters 1321.176111: NO. 274,103, dated March 20, 1883. Application filed June 21, `1882. (Nomodel.)

To all whom Muay concern:

Beit known that I, JARED A. Avans, of Mystic River, in the county of New LondonV and State of Connecticut, have inventedcer-4 V5 tain new and useful 'Improvements in Boiler Feed-Water Apparatus, of which the following is a specification. l

My invention relates to automatic means for Ycontrolling the supply of Water-to the boiler,

m so that without the care of an attendant a practicall even quantity may be kept therein; and it `consists in combining with the boiler a supply-pipe leading to a closed water-box below the level of the Water therein, a continuonslvdriven air-forcing pump, delivering by pipe to said box, a blow-ott' hole or tap between said pump and the waterbox, and means automatijcally controlled by the increase or diminution of the Water in the boiler for opening 2o and closing said holeor tap to intermit or insure the supply of compressed air to said box; in combining with' the boiler and the closed water-box from which it is supplied a continuously-driven air-'orcin e;V pum p, com municating "2 5 by pipe with said box to deliver compressed air thereto, a blow-off hole between said pump and box,a valve to close said hole, and a lever automatically controlled by the rise and tall of the water in the boiler to open and shut i 3c the valve, thereby stopping or starting the supply; in combining With the boiler and the closed Water-box from which it is supplied a con"tinuouslydriven air-forcing pump, communicating by pipe with said box to deliver i compressed air thereto, a blow-off hole between said pump fand box, a valve to close said hole, a lever controlling said valve, and a water case or cylinder connected with one arm of said llever supplied freely from the boiler,

4o so that the water-level in the two shall be the same and rising and falling limitedly with the fluctuations of its contents, whereby the lever is operated; in combining With the boiler andV the lever which controls the Water-supply y pump a'water case or cylinder connected With 5o tions and' details of construction, hereinafter described and claimed.

In the drawings,Figure lis a side elevation, partlyin sectioti,of mechanism embodying my invention. Figure 2 is a plan viewof the saine.

A is any boiler connecting bysteam-pipe c ,with a small engine, B--for instance, an oscillating engine-which, by means of pitmanor piston rod band crank b', drives a shaft, C, provided with a ily-wheel, c, for the usual purpose. A second crank, c', upon this shaft operates through pitman flthe piston of an airforcing pump. D.

Engine, shaft, and pump are herein shown as mounted upon a common base-plate, E,

ment is compact and desirable; but any other may be adopted.

Within the tank or hot-well,and near to its bottom, is placed a closed waterboX,Gr, receiviup,` its supply from the tank through clackvalve g in its own bottom. From this waterboX an eduction-pipe, H, leads to the boiler, a check-valve, h, at some suitable point inhibiting retrograde ilow of the feed-water passing therethrough. 4

An air-pipe, L, leads from the air-*forcing pump to the top of the watenbox to conduct the compressed air thereto, and intermediate between ,the pump and box has a branch, i, which terminates, as at i', in a tap or blow-off hole formed with a valve-seat. One arm of a lever, K, overhangs this blow-off hole, carrying` a valve, 7c, to close it. The valve-arm otl the lever is in the present instance and preferablydrawn down bythe stress of a spring, k, so that the valve tends constantly to shut against its seat in the blow-off hole. It is, however, feasible, by a slight change of mechanism--such as will be readily apparent from theensuingdescription-toreversetheactionof the spring, causing it to press the valveopen. It is evident now that if the valve-arm ofthe lever is down, and the blowoli` hole consequently closed, the compressed air -from the air-forcing pump will be driven into the waterbox, and will force its contents out through the eduction or boiler-feed pipe into the boiler;

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but if the free arm oi' the lever is depressed, carrying the valve away from the blow-oft' hole and opening the latter, the stream of air will escape therethrough, the pressure inthe waterbox be relieved, and they latter consequently be refilled from the surrounding tank.

In a previous application filed by me in the Patent Oiiice of the United States on the th day of June, 1882, of which the construction thus far described, with immaterial variations as to the manner of its exposition, is made the lIO special subject-matter, the opening and closing of the blow-ofi'l hole is proposed to beaccomplished by any suitable means, whether manual orautomatic. In the present case the motions of the lever are to he caused and determined at the proper times by automatic means,governed by the decrease land increase of the water-supply within the boiler-such, for instance, as the rise and fall ot' the boiler itself, as described in another application iiled by me on the 7th day of December. 181or a oat resting upon the surface of the water in said boiler, or other appropriate instrumentality. Asimple mode, however, and one equally applicable to actuating the lever or equivalent mechanism when used for stopping and starting a differenttbrm of feed-pump, is as follows:

A small closed cylinder, M, ot brass or other suitable metal, is mounted exteriorly to the boiler in manner similar to a water-gage, except that the pipes m m, which connect it to said boiler at top and bottom, form its sole means of support therefrom, and are coiled and of sutcient length to afford some elasticity and allow the cylinder to make a slight rise and fall, vaccording to the amount of water it contains. The tluctuationsoflevel in this cylinderwill correspond to the fluctuations in the boiler and its elastic supplying and supporting arms. A short arm or offset, m2, from the cylinder carries a ring or yoke, m3, which takes lover the free arm of the valve-lever. Supposing the water in the boiler to below, the cylinder will be light and rise, permitting the valve toclose by the stress of the spring, when feed will immediately commence. As the water rises in the boiler the cylinder becomes heavy and sinks, depressing the free arm of the lever and throwing the valve open, thereby again stopping the feed. I do not confine myself to the use of this rising and falling cylinder and its elastic supplying and supportingarms with the specijc form of pump abovedescribed,sinceitisevident,as-alreadyin timated, thatit may be madeto actuate through v the lever a stop-cock in a feed-pipe supplied from an overhead reservoir, or in a steam-pipe leading to some other form of pumping mechanism, or a clutch or shipper for starting and stopping such pumping mechanism; nor do I coniine myself to said cylinder as the sole and only means of automatically controlling the opening and closing of the blow-cti' hole in the described novel pump, considering it, however, preferable to others hereinbeforesuggested.

A rising and falling water case or cylinder,-

connected with the boiler by flexible pipes and supported upon a weighted lever, has heretofore been caused to actuate the arm which controls the water-supply, and in another instance a cylinder lsupported from the boiler by elastic pipes has served asawater-gage,butas nothing else. These are readily distinguishable from the device proposed by me, and I lay no claim to them or either of them; but

What I do claim is- 1. In combination with a boiler, a supplypipe leading to a closed water-box, a continuously-driven air-forcing pump delivering by pipe to said box, a blow-olf hole or Lap between said pump and water-box, and means automatically controlled by the increase or diminution ot' the Water in the boiler for opening and closing said hole or tap to intermit or insure the supply ot' compressed air to said box.

2. In combination with a boiler andA a closed water-box, from which it is supplied, a continuously-driven air-forcing pump communicatingby pipe With said box to deliver compressed air thereto, a blow-oft` hole between said pump a'nd box, a valve to close said blow-oft' hole, and a lever automatically controlled by the rise and fall ofthe water in the boiler to open and shut the valve, thereby stopping and starting the feed.

3. In combination with a boiler and a closed water-box from which it is supplied, a continuously-driven air-forcing pump communicating by pipe with said box to deliver compressed air'thereto, ablow-off hole between said pump and box, a valve to close said hole. a lever controlling said valve, and a Water case or cylinder connected with one arm of said lever supplied freely from the boiler, so that the waterlevel in the two shall be the same, and rising and falling limitedly with the fluctuations of its contents, whereby the lever is operated.

4. In combination with the boiler and with the lever which controls the 'feed-pump or water-supply, a water case or cylinder connected with said boiler and supported therefrom by an elastic supply pipe or pipes, so that it will sink or rise with the fluctuations of water-level and move the lever.

JARED A. Avans.

Witnesses LEMUEL GLIFT, F. L. Avans.

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